RT9183-15GG Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The RT9183-15GG is a linear voltage regulator IC from Richtek USA Inc. designed for positive fixed 1.5V output at 1.5A in SOT-223 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device provides over current and over temperature protection across an operating range of -40°C to 125°C with a maximum input voltage of 5.5V and dropout voltage of 0.5V at full load.

Substiute Parts

RT9183-15GG

Richtek USA Inc.In Stock: 1148RT9183-15GG Datasheet

Current PartRFQ

RT9048AGQW

Richtek USA Inc.In Stock: 3368RT9048AGQW Datasheet

MFR RecommendedRFQ

RT9183-15GGF

Richtek USA Inc.In Stock: 622RT9183-15GGF Datasheet

Parametric EquivalentRFQ

LT1963EST-1.5#PBF

Analog Devices Inc.In Stock: 4594LT1963EST-1.5#PBF Datasheet

SimilarRFQ

TLV117115DCYR

Texas InstrumentsIn Stock: 3599TLV117115DCYR Datasheet

SimilarRFQ

TLV117115DCYT

Texas InstrumentsIn Stock: 1898TLV117115DCYT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9183-15GG are classified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Fixed output voltage of 1.5V
• Positive output configuration
• Surface mount packaging (SOT-223 family)
• Operating temperature range of -40°C to 125°C
• Over current and over temperature protection
• Output current capability of 1.0A minimum

Substitution Categories:

Parametric Equivalent: RT9183-15GGF maintains identical electrical specifications and fixed 1.5V output with 1.5A capability. This part differs only in packaging designation (SOT-223F) and product status (Active vs. Obsolete), making it a direct functional replacement.

Manufacturer Recommended Substitute: RT9048AGQW is a Richtek device with adjustable output (0.65V to 5.7V range) and enhanced protection features including reverse polarity, short circuit, and UVLO protection. While output type differs (adjustable vs. fixed), the 1.5A current capability and superior dropout voltage (0.3V @ 1.5A) provide improved performance characteristics. This part requires external resistor network configuration to achieve 1.5V fixed output.

Similar Substitutes: LT1963EST-1.5#PBF (Analog Devices), TLV117115DCYR, and TLV117115DCYT (Texas Instruments) maintain fixed 1.5V output in SOT-223 packaging with -40°C to 125°C operation. These parts exhibit variations in output current (1.0A vs. 1.5A), quiescent current, dropout voltage, and protection feature sets.

Parameter Comparison

Engineering Selection Recommendations

RT9183-15GGF is the primary direct replacement for RT9183-15GG. Both parts maintain identical electrical specifications with fixed 1.5V output and 1.5A current capability. RT9183-15GGF carries Active product status with full RoHS3 compliance and standard MSL-3 moisture sensitivity rating, ensuring long-term availability and manufacturing support.

RT9048AGQW provides enhanced performance through superior dropout voltage (0.3V vs. 0.5V) and comprehensive protection features including reverse polarity and short circuit protection. The adjustable output topology requires external resistor configuration to establish 1.5V fixed output but offers design flexibility for future voltage adjustments. This part is Active status with RoHS3 compliance.

LT1963EST-1.5#PBF from Analog Devices maintains fixed 1.5V output with higher maximum input voltage rating (20V vs. 5.5V), suitable for applications requiring extended input voltage tolerance. The higher quiescent current (1.5 mA vs. 500 µA) and MSL-1 moisture sensitivity rating indicate superior reliability for demanding environments. Product status is Active with full RoHS3 compliance.

TLV117115DCYR and TLV117115DCYT from Texas Instruments are functionally equivalent parts with reduced output current (1.0A vs. 1.5A) and lower quiescent current (100 µA). Both carry Last Time Buy status, indicating limited future availability. Selection of these parts should account for current derating and end-of-life procurement planning. Both maintain RoHS3 compliance with MSL-1 moisture sensitivity.

For new designs requiring 1.5A output capability, RT9183-15GGF or RT9048AGQW are recommended. For applications tolerating 1.0A output, TLV117115DCYR or TLV117115DCYT provide lower quiescent current benefits. LT1963EST-1.5#PBF is suitable for high input voltage applications exceeding 5.5V.

Frequently Asked Questions (FAQ)

Q: Can RT9183-15GGF directly replace RT9183-15GG without circuit modifications?

A: Yes. RT9183-15GGF is a parametric equivalent with identical electrical specifications, fixed 1.5V output, 1.5A current capability, and -40°C to 125°C operating range. The only difference is packaging designation (SOT-223F) and product status (Active). No circuit modifications are required.

Q: What is the key difference between RT9048AGQW and the fixed-output substitutes?

A: RT9048AGQW features adjustable output voltage (0.65V to 5.7V) controlled by external resistor divider network, whereas RT9183-15GG, RT9183-15GGF, LT1963EST-1.5#PBF, and TLV117115 series provide fixed 1.5V output. To use RT9048AGQW as a 1.5V replacement, external resistors must be added to the feedback network. RT9048AGQW offers superior dropout voltage (0.3V) and enhanced protection features.

Q: Why do TLV117115DCYR and TLV117115DCYT show Last Time Buy status?

A: Last Time Buy status indicates Texas Instruments has announced end-of-life for these parts. Existing inventory remains available, but no new production is planned. Designs using these parts should transition to alternative sources for long-term production continuity.

Q: What is the impact of different quiescent current specifications?

A: Quiescent current (Iq) represents standby power consumption when the regulator is active but delivering minimal load current. RT9183-15GG and RT9183-15GGF specify 500 µA, while TLV117115 series specify 100 µA. Lower quiescent current reduces standby power dissipation in battery-powered applications. LT1963EST-1.5#PBF at 1.5 mA is higher and less suitable for low-power standby scenarios.

Q: Can I use LT1963EST-1.5#PBF in applications with 5.5V maximum input voltage?

A: Yes. LT1963EST-1.5#PBF is rated for 20V maximum input voltage, which exceeds the 5.5V requirement of RT9183-15GG. This part is fully compatible with 5.5V input applications and provides additional margin for input voltage transients.

Q: What packaging considerations apply when substituting RT9048AGQW?

A: RT9048AGQW uses 8-WDFN (3x3) packaging versus SOT-223 for the main part and other substitutes. The WDFN package has a smaller footprint but requires different PCB layout and solder reflow profiles. Thermal performance is improved due to exposed pad design. PCB artwork must be redesigned to accommodate the different pin configuration and package dimensions.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (RT9183-15GGF, RT9048AGQW, LT1963EST-1.5#PBF, TLV117115DCYR, TLV117115DCYT) carry ROHS3 Compliant certification, meeting lead-free and hazardous substance restrictions for EU and global markets.

Q: Which substitute offers the best dropout voltage performance?

A: RT9048AGQW provides the lowest dropout voltage at 0.3V @ 1.5A, compared to 0.5V for RT9183-15GG and RT9183-15GGF, 0.55V for LT1963EST-1.5#PBF, and 0.8V for TLV117115 series. Lower dropout voltage reduces minimum input-to-output voltage differential, improving efficiency in low-voltage input applications.